Vote for Active Folders Content Manager for Exchange
Active Folders Content Manager is an application that searches the Exchange information stores (public and private) for content matching the search criteria set by the administrator. The message and attachments are searched by an NT / Win2k service that is installed on a dedicated server or installed on the Exchange server. All message criteria can be searched upon such as creation date, size of attachments and of course key words. The policies themselves are schedulable and can easily be set to search at times of low utilization.